Improved dumping-scow



N. PETERS, PHOTO-LITHOGRAPHER, WASHINGTON. D. C.

ing-Scows and I do hereby declare that the following,

stantially as large flat-boats, decked over at their sides the loadproposed, this being carried in a flaring or hop- Vwhich receptacle hasan opening entirely through the closed thereby.

HENRY W'. WILSON, OF BOSTON, MASSACHUSETTS.

:Letters Patent No. 86,614,

daad Fama/ry 2,1869.

INEPROVED DUMPING-SCOW.

The vScheduleinferred to iu these Letters Patent and making part of theum.

To all whom-it may concern.-

Be ,it-known that I, HENRY W.W11.soN, of Boston, in the county orfSuffolk, and State of Massachusetts, have inventeda new and usefulImprovement in Dumptaken in connection with the drawings which accompanyand form part of this specification, is a description of my inventionsnicient to enable those skilled in the art to practise it.

Dumping-scows have for some years been made suband ends, so as to make awater-tight chamber or chambers, of suflicient capacity or displacementto sustain per-like' receptacle, made in the middle of the scow,

scow, which is provided with drops or flaps, which open downward andoutward, the flaps being'double, closing along the longitudinal centreof the scow, and being hinged 'at each side ofthe opening.

These falls or flaps are held in place, so as to sustain the load, bymeans of chains passing from them over a windlass arranged over thefore-and-aft centre of the scow, so that, when the windlass is turned inone direction, the chains secured to the flaps slacken, and the fallsIgravitate downward, and upon turning the windlass in the otherdirection, the flaps are raised and Now, these scows cannot be used foriilling upon ats up to their loaded draught of water, for the reasonthat the fiaps are so h'ung thereon, that, to open them to discharge theload, there must be a considerable depth of water below the bottom ofthescow, so that the aps inay, in falling, project a considerable distancebelow the bottom of the scow, usually, in practice, about twenty inches,so that, unless the depth of water belowthe bottom of thev scow, whenloaded, is about the distance to which the edges of the aps project whenopen, the load, not iinding a free outlet, wedges and jams inescaping,and thus prevents discharge of the load, except where the water is deepenough to allow the iiaps to assume a nearly vertical position.

My invention consists in so hinging .or hanging the aps ofdumping-snows, that they will not project sufficiently below the bottomthereof to cause, by their striking on the ground beneath` such acontraction of the dumping-opening as will prevent the discharge of lthe load.

In the practice of my invention, I prefer to have the edges of the flapscome flush with or Within the bottom of the scow; but a small projectionbeyond it, such 'as will not cause the aps to retain thel load, byinsuicient opening, while not advisable, will be no departure from thegist of my invention.

The drawingillnstrates, in cross-section, an embodiment of my invention.

a is the bottom of the scow.

b 11, the outer sides.

c, the deck. v

e e, thel inner sides, forming the well through the scow, while thehopper, which is bounded by f f f, is partly elevated above the deck.

Communication between the hopper and the well is controlled by the flapsg g.- These are hinged and hung, as shown in the section, the iiapsbeing shown in black lines, as open or down, and as closed or up, in redlines.

The fore-and-aft windlass is marked h, and the chain from the flaps tothe windlass is denoted by c It will now be obvious that wherever'aloaded scow of this modified construction can be iioated, there it candischarge, .and iioat oi free from its cargo, for the v hopperdischarges into the well, the flaps opening Wide to prevent jamming orchoking, and when the load is discharging, and no longer wholly rests onthe scow, this rises by its buoyancy, so that it rises from the matterdischarged.r

This rising of the scow begins the moment the load moves down inthehopper, and the form which the deposit vtakes by gravitationis notunlike the reverse of the interior of the hopper.

I claim a iioating scow, having a mud-chamber, with inclined sides, andsupported on the air-chambers, and having its long narrow naps, whichmake the bottom- 'outlet offthe mud-chamber, so arranged that when theyare let fall by the windlass, they do not project beyond thescow-bottom, substantially as and for the purpose specied.

n HENRY W. WILSON. Witnesses:

J. B. CROSBY, FRANCIS GoULD.

